$-7-0.5-4$
$z^2-6z$
$6\left(x^2+1\right)-\left(2x-4\right)\left(3x+2\right)<\:3\left(5x+21\right)$
$\left(9z-11w\right)^3$
$\left(d^8-2\right)^4$
$x\cos^2\left(y\right)dx=\tan\left(y\right)dy$
$\frac{x^3-3s^2-2s+8}{s^3\left(s-2\right)^2}$
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